CN108725527B - Folding vehicle - Google Patents
Folding vehicle Download PDFInfo
- Publication number
- CN108725527B CN108725527B CN201710242420.4A CN201710242420A CN108725527B CN 108725527 B CN108725527 B CN 108725527B CN 201710242420 A CN201710242420 A CN 201710242420A CN 108725527 B CN108725527 B CN 108725527B
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- China
- Prior art keywords
- assembly
- chassis
- hinged
- side wall
- folding
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
- B62B3/025—Foldable roll containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
- B62B3/022—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible folding down the body to the wheel carriage or by retracting projecting parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/007—Coaster wagons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0003—Adaptations for loading in or on a vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/06—Hand moving equipment, e.g. handle bars
- B62B5/067—Stowable or retractable handle bars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
- B62B2205/06—Foldable with a scissor-like mechanism
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
- B62B2205/12—Collapsible wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
- B62B2205/12—Collapsible wheels
- B62B2205/123—Collapsible wheels comprising a foldable interconnecting shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
- B62B2205/20—Catches; Locking or releasing an articulation
- B62B2205/23—Catches; Locking or releasing an articulation foot operated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
Abstract
The embodiment of the application provides a folding bicycle, which comprises: the frame comprises a front frame and a rear frame which are oppositely arranged; the chassis assembly comprises a front chassis assembly and a rear chassis assembly which are hinged between the front frame and the rear frame and are mutually hinged; the wheel folding assembly comprises a rear wheel half shaft rotating rod, a rear wheel half shaft, a rotating pull rod, an automatic foot assembly and a rotating connecting rod; one end of the rear wheel half shaft rotating rod is pivotally connected with the rear chassis assembly, and the other end of the rear wheel half shaft is provided with a rear wheel for arrangement; one end of the rotary pull rod is pivoted with the rear chassis assembly, and the other end of the rotary pull rod is pivoted with the rear wheel half-axle rotating rod so as to drive the rear wheel half-axle rotating rod to fold.
Description
Technical Field
The present application relates to a folding cart, and more particularly to a folding cart having substantially identical track widths when in use.
Background
Folding carts are widely used in the handling of goods, in the carrying of children, garden equipment and other situations. A typical folding cart has a cart body, a push handle, and four wheels.
Folding carts are versatile for pedestrians and at the same time a short distance transport cart, sometimes requiring it to be placed in a car. The conventional folding cart is not foldable, so that it is difficult to carry.
As prior art, US patent 5,957,482, filed 8/30/1996, proposes a collapsible pushchair in which two folding beds connected in half by hinges are folded against each other for convenient storage, and a removable track module can be moved for storage. In addition, there are also folding carts that can be folded to a small size for convenient storage, for example, U.S. patent 6,845,991 to 3/17/2003 discloses a foldable folding cart that can be folded to a size similar to a suitcase module.
The inventor Chen Zhaosheng of the present application devised a number of different folding carts including folding carts having a panel and an umbrella fitting. However, these prior art techniques rely on a collapsible frame, and a pair of angled elongate bars to form the frames. However, the prior art has problems that the long rod is not firm enough, the foldable bracket cannot be locked firmly, and the stability and the firmness are insufficient.
Disclosure of Invention
In order to solve the problems in the prior art, an embodiment of the present application provides a folding cart, including:
the frame comprises a front frame and a rear frame which are oppositely arranged;
the chassis assembly comprises a front chassis assembly and a rear chassis assembly which are hinged between the front frame and the rear frame and are mutually hinged;
the wheel folding component comprises a rear wheel half shaft rotating rod, a rear wheel half shaft and a rotating pull rod;
one end of the rear wheel half shaft rotating rod is pivotally connected with the rear chassis assembly, and the other end of the rear wheel half shaft is provided with a rear wheel for arrangement; one end of the rotary pull rod is pivoted with the rear chassis assembly, and the other end of the rotary pull rod is pivoted with the rear wheel half-axle rotating rod so as to drive the rear wheel half-axle rotating rod to fold.
In one embodiment of the folding cart of the present application, the wheel folding assembly includes a half axle swivel rod hinge, and the rear wheel half axle swivel rod is disposed on the rear chassis assembly by the half axle swivel rod hinge.
In one embodiment of the folding cart of the present application, the rear wheel axle shaft lever comprises a parallelogram lever formed from a lever body to maintain the rear wheel axle shaft parallel to the ground during rotation of the rear wheel axle shaft lever.
In an embodiment of the folding bicycle of the present application, the wheel folding assembly further includes two sets of rod pulling mechanisms, and two ends of each set of rod pulling mechanisms are respectively pivotally connected to the rear chassis assembly and the rear wheel axle shaft rotating rod.
In an embodiment of the folding cart of the present application, the rod pulling mechanism includes a first rod pulling rod and a second rod pulling rod sleeved with each other, the first rod pulling rod is connected to the rear chassis assembly, the second rod pulling rod is connected to the rear wheel axle shaft rotating rod, the rod pulling mechanism is compressed when the chassis assembly is in the working position, and the rod pulling mechanism is stretched when the chassis assembly is in the folding position.
In an embodiment of the folding bicycle of the present application, the wheel folding assembly further includes an automatic foot assembly and a rotating connecting rod, one end of the rotating connecting rod is hinged to the rear chassis assembly, the other end of the rotating connecting rod is hinged to the automatic foot assembly, and the automatic foot assembly is folded and extended by the rear chassis assembly, so that the folded folding bicycle stands.
In one embodiment of the folding cart of the present application, said folding cart further comprises:
a main chassis including a front main chassis member and a rear main chassis member disposed above the front chassis assembly and the rear chassis assembly and hinged to each other;
the two sets of side wall assemblies, each set of side wall assemblies respectively comprises a rear chassis cross bar support and a front chassis cross bar support which are hinged with each other and form a certain angle, wherein the front chassis cross bar support is hinged with the front frame through a front connecting piece of the main side wall assembly, the rear chassis cross bar support is hinged with the rear frame through a rear connecting piece of the main side wall assembly, the rear chassis cross bar support and the front chassis cross bar support are hinged with a chassis cross bar connecting piece, a chassis cross bar is connected between the two chassis cross bar connecting pieces, and the chassis cross bar is positioned below the chassis assemblies;
a main basket body front support is respectively hinged between the front chassis cross bar support and the front frame, and a main basket body rear support is respectively hinged between the rear chassis cross bar support and the rear frame;
in an embodiment of the folding bicycle of the present application, the wheel folding assembly further includes a locking mechanism, wherein the locking mechanism is pivotally fixed to the rotating connecting rod and is hooked to the chassis cross rod when the folding bicycle is located at the working position, and when the locking mechanism is pulled up, the locking mechanism is separated from the chassis cross rod and drives the front chassis assembly and the rear chassis assembly to fold relatively.
In one embodiment of the folding cart of the application, each set of side wall assemblies further comprises an auxiliary side wall assembly rear connector and an auxiliary side wall assembly front connector hinged to each other, the auxiliary side wall assembly rear connector being hinged to the front frame, the auxiliary side wall assembly front connector being hinged to the rear frame.
In one embodiment of the folding cart of the present application, the folding cart further comprises a push handle assembly hinged to the rear frame, the push handle assembly further comprising a push handle support upper region and a push handle support lower region hinged to each other, the push handle support upper region being hinged to a push handle extension of the push handle assembly, the push handle support lower region being hinged to the rear frame.
The wheel distance of the front wheel and the rear wheel is approximately the same when the folding vehicle is in operation, so that the running state of the folding vehicle is stable, the wheel distance of the front wheel or the rear wheel is reduced when the folding vehicle is folded, one wheel distance can be contained in the other wheel distance, and the folded structure is simplified.
Drawings
Fig. 1 is a side view of a folding cart.
FIG. 2 is a perspective view of an isometric angle of the folding cart when unfolded
FIG. 3 is a perspective view of the folding cart when unfolded
FIG. 4 is a perspective view of the folding cart from a higher angle when unfolded
Fig. 5 is a side view of the folding cart when folded.
Fig. 6 is a perspective view of the folding cart when folded.
Fig. 7 is a side view of the folding cart in a half-folded condition.
Fig. 8 is a side view of the folding cart in a half-folded condition.
Main element and reference numeral
Detailed Description
The application provides a folding cart with a lockable underframe. The folding cart can be unfolded to be in a use position and can be folded to be in a storage position. The lockable chassis can be folded upwards to enable stowing. The folding vehicle is provided with an equal-wheel-distance folding chassis, wherein the equal-wheel-distance folding chassis refers to that the wheel distances of front wheels and rear wheels of the chassis of the folding vehicle formed by 4 wheels are equal when the chassis is in a working position; the positions of the front and rear wheels are compatible when in the folded position. During folding, the distance between the rear wheels (or front wheels) becomes smaller gradually, and when folded to the extreme position, the two rear wheels (or front wheels) can be accommodated between the two front wheels (or rear wheels).
The folding machine mainly comprises the following components: the foldable chassis assembly 10, the front frame 40, the rear frame 30, the main side wall assembly 20, the auxiliary side wall assembly 60, the push handle assembly 50, and the wheel well assembly 100. The following description is made with reference to the different drawings.
The folding cart has a foldable chassis assembly 10. As shown in fig. 1 and 2, the chassis assembly 10 is composed of a pair of relatively foldable flat plate structures, namely, a rear chassis assembly 11 and a front chassis assembly 12, which may each be a frame structure formed by welding steel pipes. When welded steel pipes are used, the steel pipes may have a square cross section, and the upper and lower surfaces (i.e., two surfaces parallel to the ground) of the steel pipes are planar.
The above-described "rear chassis assembly 11" and "front chassis assembly 12" are defined as follows: when the user pushes and pulls the folding cart using the handle 54 (see fig. 3), the rear chassis assembly 11 approaches the user and the front chassis assembly 12 moves away from the user. However, it will be clear to those skilled in the art that the terms "front" and "rear" are used relatively, and are not fixed, as the position of the user is determined, and do not limit the technical solution of the present application.
The rear chassis assembly 11 is hinged with the front chassis assembly 12 at a middle chassis joint 13, the middle chassis joint 13 may rest on a chassis rail 14, the chassis rail 14 being lower in height than the middle chassis joint 13, i.e. the chassis rail 14 extends from one side of the folding cart to the other from below the middle chassis joint 13. The intermediate chassis joint 13 is a portion of the chassis assembly 10 that abuts the chassis rail 14, i.e., the chassis rail 14 and the chassis assembly 10 may be separated from each other or may be in contact with each other.
The intermediate chassis joint 13 may have a lockable spindle that can be opened more than 180 °. When opened beyond 180 °, the weight of the rear chassis assembly 11 and the front chassis assembly 12 deflects the chassis assembly 10 to a locked position. That is, upon folding, the rear chassis assembly 11 and the front chassis assembly 12 pivot relative to the lockable pivot, and the angle of the plane in which the rear chassis assembly 11 and the front chassis assembly 12 lie gradually decreases, so that the chassis assembly 10 enters a folded state.
In addition to the intermediate chassis joint 13 abutting the chassis rail 14 and being supported upwardly by the chassis rail 14, the rear chassis assembly 11 or the front chassis assembly 12 may also be disposed on the chassis rail 14 and supported upwardly by the chassis rail 14. Optionally, the contact areas of any two of the rear chassis assembly 11, the front chassis assembly 12, the intermediate chassis joint 13, and the chassis rail 14 may have a spring treatment, a cladding material, or a surface treatment to improve the connection performance.
The rear chassis assembly 11 is hinged to the rear chassis joint 15 and the front chassis assembly 12 is hinged to the front chassis joint 16.
The folding cart in the embodiment of the application further comprises a wheel folding assembly 100, as shown in fig. 2, comprising: a half shaft hinge 101, a rear wheel half shaft 102, a rear wheel half shaft 103, a rotary pull rod 105, a rod drawing mechanism 106, an automatic foot assembly 107, a rotary connecting rod 108 and a locking mechanism 109.
At a proper position on the chassis assembly 10 (for example, the rear end of the rear chassis assembly 11), two axle shaft hinges 101 forming an acute angle with the horizontal direction are installed, the axle shaft hinges 101 are inclined hinges, two left and right rear wheel axle shaft rotating rods 102 are installed on the axle shaft hinges, the rear wheel axle shaft rotating rods 102 are also arranged in an inclined manner, each rear wheel axle shaft rotating rod 102 is made of iron for example, and can be composed of a parallelogram so as to keep the axle shaft 103 of the pivoted half wheel 104 to be always parallel to the ground in the rotation process of the rear wheel axle shaft rotating rod 102, and the rear wheel for walking, namely, the wheel opposite to the front wheel and close to one side of the push handle assembly is installed on the axle shaft 103.
The rotation of the rear axle shaft lever 102 is driven by a rotation lever 105 mounted to the chassis assembly 10 (e.g., the opposite rear end of the front chassis assembly 12) to maintain two extreme positions of the rear axle shaft lever 102, namely, an operative position and a folded position, and two sets of extraction lever mechanisms 106 are mounted between the chassis assembly 10 and the rear axle shaft lever 102 to maintain the two extreme positions of the rear axle shaft lever 102, namely, the longest position and the shortest position of the extraction lever mechanisms 106, and the extraction lever mechanisms 106 are shortest in length to support the chassis assembly 10 when the chassis assembly 10 is in the operative position to enhance the load carrying capacity of the chassis assembly 10 (e.g., up to 100 kg or more in practical tests), and an automatic foot assembly 107 is mounted to the chassis assembly 10, the automatic foot assembly 107 moves with the chassis assembly 10, and is in the two extreme positions, and the automatic foot assembly 107 is retracted when the chassis assembly 10 is in the operative position without affecting the travel of the vehicle, and the automatic foot assembly is extended to stand by itself when the chassis assembly 10 is in the folded position.
In one embodiment, the rotating connecting rod 108 is hinged to the chassis assembly 10 at one end, such as the rear chassis assembly 11 or the front chassis assembly 12, and to the automatic foot assembly 107 at the other end. The two pivoting levers 105 are hinged to the pivoting lever 108. The latch mechanism 109 is pivotally fixed to the rotating connecting rod 108, and is hooked to the chassis rail 14 when the folding cart is in the working position, and when the latch mechanism 109 is pulled up, the latch mechanism 109 is disengaged from the chassis rail 14, and drives the front chassis assembly 12 and the rear chassis assembly 11 to fold relatively.
For the rear chassis assembly 11 and the front chassis assembly 12, a plurality of chassis member rails 19 may be welded to form a frame having a planar structure. The chassis rail 14 supports the chassis assembly 10, but the chassis rail 14 is not part of the chassis assembly 10. Instead, the chassis rail 14 is part of the main side wall assembly 20.
As shown in fig. 3 and 4, the major side wall assemblies 20 are connected to the chassis rail 14 with chassis rail connectors 21. A pair of major side wall assembly rear chassis rail supports 22 extend diagonally from the chassis rail connectors 21 and are connected to a pair of major side wall assembly rear side wall connectors including a major side wall assembly left rear side wall connector 24 and a major side wall assembly right rear side wall connector 26. The main side wall assembly left rear side wall connector 24 and the main side wall assembly right rear side wall connector 26 are, for example, connecting bars, and the chassis rail connector 21 is, for example, a connector, but not limited thereto.
Similarly, a pair of main side wall assembly front chassis rail supports 23 are connected to the chassis rail connectors 21 and extend to a pair of main side wall assembly front side wall connectors including a main side wall assembly left front side wall connector 25 and a main side wall assembly right front side wall connector 27. At the rear of the folding cart, the pair of main side wall assembly rear side wall connectors extend to the rear basket assembly 28. The rear basket assembly 28 is capable of receiving a rear basket assembly fabric basket (not shown) for storing items. Alternatively, the rear basket assembly fabric basket does not typically contact the foot support extension rails 18 therebelow.
The rear basket assembly support 29 is hinged to the rear basket assembly 28. The rear basket assembly 28 is rigidly connected to and preferably integrally formed with the pair of major side wall assembly rear side wall connectors 24, 26. The pair of rear basket assembly supports 29 are preferably pivotally connected, such as riveted, to the outer surfaces of the rear basket assembly 28. The rear basket assembly support 29 can be formed in a ferrous elongated shape that can be stamped or embossed to increase torsional resistance.
The rear basket assembly 28 is pivotally connected to the rear frame 30. As shown in fig. 3 to 4, the rear frame 30 has a frame of a substantially rectangular structure including a pair of horizontal members and a pair of connected vertical members. Preferably, the rear frame 30 can be integrally formed by one or two bent tubular metal members. Finally, a plurality of joints are provided on the pair of rear frame side vertical members 39 for connection to the side walls and chassis assembly 10.
The rear frame 30 has a left rear frame lower joint 31 and a right rear frame lower joint 32, both pivotally connected to the rear chassis assembly 11 and simultaneously pivotally connected to the auxiliary side wall assembly rear connector 61, respectively. The rear frame 30 also has a left rear frame upper joint 33 and a right rear frame upper joint 34. The left rear frame upper joint 33 is pivotally connected to the main side wall assembly left rear side wall connection 24 and is connected between the main side wall assembly left rear side wall connection 24 and the rear basket assembly 28. Similarly, the right rear frame upper joint 34 is pivotally connected to the main side wall assembly right rear side wall connection 26 and is connected between the main side wall assembly right rear side wall connection 26 and the rear basket assembly 28. As such, the rear basket assembly 28 is pivoted upwardly and then thereafter as the pair of main side wall assembly rear side wall connectors are pivoted downwardly. The weight of the rear basket assembly 28 locks the pair of major side wall assembly rear side wall connectors at an angle, i.e., in the unlocked condition, the major side wall assembly rear chassis rail support 22 is no longer parallel to the major side wall assembly left rear side wall connection 24.
The rear frame 30 also has a right rear frame push handle joint 35 and a left rear frame push handle joint 36, both of which are connected to the push handle. The joints of the rear frame 30 may be riveted to the pair of rear frame side vertical members 39.
The front frame 40 has a front frame left lower joint 41 and a front frame right lower joint 42, both of which are pivotally connected to the front chassis assembly 12 and the auxiliary side wall assembly front connector 62. The front frame left upper pivot joint 43 is pivotally connected to the main side wall assembly left front main side wall connector 25. The front frame right upper joint 44 is pivotally connected to the main side wall assembly right front main side wall connector 27.
The front frame 40 may have the same structure as the rear frame 30, including a front frame upper horizontal member 45 and a front frame lower horizontal member 46 located thereunder. The front frame left side vertical member 47 and the front frame right side vertical member 48 are connected to the front frame upper horizontal member 45 and the front frame lower horizontal member 46, respectively.
The pair of vertical members are provided with a plurality of pivot joints. As can be seen in fig. 5 and 6, and in combination with other figures, the push handle assembly 50 is pivotally connected to the rear frame 30. The push handle assembly 50 includes a push handle extension 51 extending from the right rear frame push handle joint 35 and the left rear frame push handle joint 36. The push handle assembly 50 preferably includes a push handle body 55 and a push handle through post 56 that is connected through the pair of push handle extensions 51. The left and right push tabs 53, 54 may be plastic members that include a sleeve for receiving the pair of push extensions 51, coupling the pair of push extensions 51 with the push handle body 55.
The pusher assembly 50 is supported by a pusher support comprising a pusher support upper region 57 and a pusher support lower region 58. A push handle support joint 59 connects the push handle support upper region 57 to the push handle support lower region 58. The push support tab 59 forms a tab (elbow joint) with a hinge that locks at a particular angle at which the upper push support region 57 rotates from the lower push support region 58 to a position that is approximately or more than 180 degrees. The lower region of the pusher support is pivotally connected to the rear frame 30. The push handle support tab 59 may also be pivotally connected to the rear basket assembly support 29.
The auxiliary side wall assembly 60 has an auxiliary side wall assembly rear connector 61 connected to an auxiliary side wall assembly front connector 62. The auxiliary side wall assembly rear connector 61 is pivotally connected to the auxiliary side wall assembly rear connector fitting 63. Similarly, the auxiliary side wall assembly front connector 62 is pivotally connected to the auxiliary side wall assembly front connector fitting 64. The auxiliary side wall assembly rear connector fitting 63 may be separated from the auxiliary side wall assembly front connector fitting 64.
The main sidewall assembly is formed and V-shaped and is connected to the auxiliary sidewall assembly. The auxiliary side wall assembly rear connector 61 has a pair of auxiliary side wall assembly rear cross-joints 65 connected to the main side wall assembly rear chassis rail supports 22. Similarly, the auxiliary side wall assembly front connector 62 has a pair of auxiliary side wall assembly front cross-connects 66 connected to the main side wall assembly front chassis rail support.
As shown in FIG. 8, the main side wall assembly and the auxiliary side wall assembly preferably support the main housing 70. The main housing 70 includes a rear main housing member 71 hinged to the front main housing member 72 at a main housing center joint 79. The main housing middle joint 79 is defined at 180 degrees. The rear main casing member 71 has a main casing rear left support 73 and a main casing rear right support 74, and the front main casing member 72 has a main casing front left support 75 and a main casing front right support 76. The main housing support is pivotally connected to a main housing support upper joint 77 and a main housing support lower joint 78. A main housing support lower joint 78 is provided at the main side wall assembly 20 and a main housing support upper joint 77 is provided at the main housing 70. The main housing rear left support 73 and the main housing rear right support 74 have a main housing support lower joint 78 pivotally connected to the main side wall assembly rear chassis rail support at a position below the auxiliary side wall assembly rear cross joint 65. The main housing front left support 75 and the main housing front right support 76 have a main housing support lower joint 78 pivotally connected to the main side wall assembly front chassis rail support 23 at a position below the auxiliary side wall assembly front cross joint 66.
The main sidewall middle joint 91 connects the main sidewall assembly rear chassis rail support 22 to the main sidewall assembly front chassis rail support 23. The main side wall assembly left rear side wall connection 24 and the main side wall assembly right rear side wall connection 26 are pivotally connected to the main side wall assembly rear chassis rail support 22. The main sidewall front joint 93 connects the main sidewall assembly left front sidewall connection 25 and the main sidewall assembly right front sidewall connection 27 to the pair of main sidewall assembly front chassis rail supports 23.
Having described the above structure, these figures show a schematic view of a mechanism for maintaining a folding cart in an unfolded position providing a plurality of locking tabs.
The rear frame 30 forms a four bar mechanism having a major side wall assembly rear chassis rail support 22, major side wall assembly rear side wall connectors 24/26, a rear frame side vertical member 39, and a minor side wall assembly rear connector 61. Similarly, the front frame 40 forms a four bar mechanism including the front cross bar support 23, the major side wall assembly front side wall connectors 25/27, the front frame vertical members and the auxiliary side wall assembly front connectors 62. The four bar mechanisms are located on the front and rear sides of the folding cart and are each connected to a central four bar mechanism formed by the connection of the auxiliary side wall assembly rear connector 61 and the auxiliary side wall assembly front connector 62, the main side wall assembly rear chassis rail support 22 and the main side wall assembly front chassis rail support 23 that connect the two. Thus, the three connected four bar mechanisms achieve a bottom lock in the deployed position.
In operation, the primary locking mechanism is preferably a three four bar mechanism of the major side wall assembly and the minor side wall assembly forming a secondary locking mechanism at the location where the intermediate chassis joint 13 abuts the chassis rail 14 for ensuring locking of the primary locking mechanism. In addition, the collapsible push handle assembly 50 is a third locking mechanism for locking and unlocking with the hinge (i.e., the push handle support tab 59), and when the push handle support tab 59 is in the locked position, like a human knee latch, the downward weight of the push handle assembly 50 holds the rear basket assembly 28, in turn holding the main side wall assembly rear side wall connectors 24, 26, holding the main side wall assembly rear chassis rail support 22 of the main side wall assembly 20. Thus, the main locking mechanism is fixed by the auxiliary locking mechanism, and the auxiliary locking mechanism is fixed by the third locking mechanism.
Alternatively, the wheels may be pivotable and may have an axle 94. Axle 94 preferably has an axle lock 95 for locking the wheel against rotation when needed.
In summary, the present application provides a folding cart, which has at least the following advantages:
first, the folding bicycle provided by the application is firm and reliable, can realize stable locking, and has higher stability and firmness.
Secondly, the folding trolley provided by the application has a exquisite structure, the space ratio of the opening station to the folding station is about 1:4, and self-locking can be realized by means of gravity.
Thirdly, the wheel distance of the front wheel and the rear wheel is approximately the same when the folding vehicle is in operation, so that the running state of the folding vehicle is stable, and the wheel distance of the front wheel or the rear wheel is reduced when the folding vehicle is folded, and the folding vehicle can be accommodated in the other folding vehicle, so that the folding structure is simplified.
Claims (8)
1. A folding cart, comprising:
a frame comprising a front frame (40) and a rear frame (30) arranged opposite each other;
-a chassis assembly comprising a front chassis assembly (12) and a rear chassis assembly (11) hinged between said front frame (40) and said rear frame (30) and to each other; the folding bicycle further comprises two groups of side wall assemblies, each group comprises a rear chassis cross rod support (22) and a front chassis cross rod support (23) which are hinged to each other and form a certain angle, the rear chassis cross rod support (22) and the front chassis cross rod support (23) are hinged to a chassis cross rod connecting piece (21), a chassis cross rod (14) is connected between the two chassis cross rod connecting pieces (21), and the chassis cross rod (14) is positioned below the chassis assemblies;
the wheel folding assembly (100) comprises a rear wheel half shaft rotating rod (102), a rear wheel half shaft (103), a rotary pull rod (105), an automatic foot assembly (107) and a rotary connecting rod (108); one end of the rotating connecting rod (108) is hinged to the rear chassis assembly (11), the other end of the rotating connecting rod is hinged to the automatic foot assembly (107), and the automatic foot assembly (107) stretches out along with the folding of the rear chassis assembly (11) so that the folded folding vehicle stands; the wheel folding assembly (100) further comprises a locking mechanism (109), wherein the locking mechanism (109) is pivotally fixed on the rotary connecting rod (108) and is hooked on the underframe cross rod (14) when the folding vehicle is positioned at the working position, and when the locking mechanism (109) is pulled upwards, the locking mechanism (109) is separated from the underframe cross rod (14) and drives the front underframe assembly (12) and the rear underframe assembly (11) to be folded relatively;
one end of the rear wheel half shaft rotating rod (102) is pivotally connected with the rear chassis assembly (11), and the other end of the rear wheel half shaft rotating rod is provided with the rear wheel half shaft (103) for arranging a rear wheel; one end of the rotary pull rod (105) is pivoted on the rotary connecting rod (108), and the other end of the rotary pull rod is pivoted on the rear wheel half-shaft rotating rod (102) so as to drive the rear wheel half-shaft rotating rod (102) to fold.
2. The folding cart of claim 1, wherein the wheel folding assembly (100) includes a half shaft swivel lever hinge (101), the rear wheel half shaft swivel lever (102) being disposed on the rear chassis assembly (11) by the half shaft swivel lever hinge (101) obliquely with respect to a horizontal plane.
3. The folding cart of claim 1 wherein said rear wheel axle shaft lever (102) is formed as a parallelogram from a rod body to maintain said rear wheel axle shaft (103) parallel to the ground during rotation of said rear wheel axle shaft lever (102).
4. The folding cart of claim 1, wherein the wheel folding assembly (100) further comprises two sets of lever mechanisms (106), and two ends of each set of lever mechanisms (106) are pivotally connected to the rear chassis assembly (11) and the rear wheel axle shaft (102), respectively.
5. The folding cart of claim 4 wherein said lever mechanism (106) comprises a first lever and a second lever that are nested with each other, said first lever being coupled to said rear chassis assembly (11) and said second lever being coupled to said rear wheel axle shaft (102), said lever mechanism (106) being compressed when said chassis assembly (10) is in the operative position and said lever mechanism (106) being stretched when said lever mechanism (106) is in the collapsed position.
6. The folding cart of claim 1 further comprising:
a main casing including a front main casing member (72) and a rear main casing member (71) which are provided above the front chassis assembly (12) and the rear chassis assembly (11) and are hinged to each other;
wherein the front chassis rail support (23) is hinged to the front frame (40) by a main side wall assembly front connector (25), and the rear chassis rail support (22) is hinged to the rear frame (30) by a main side wall assembly rear connector (24);
main basket front supports (75/76) are hinged between the front chassis cross bar supports (23) and the front frames (40) respectively, and main basket rear supports (73/74) are hinged between the rear chassis cross bar supports (22) and the rear frames (30) respectively.
7. The folding cart of claim 1 wherein each set of said side wall assemblies further includes an auxiliary side wall assembly rear connector (61) and an auxiliary side wall assembly front connector (62) hinged to each other, said auxiliary side wall assembly rear connector (61) being hinged to said front frame (40), said auxiliary side wall assembly front connector (62) being hinged to said rear frame (30).
8. The folding cart of claim 1, further comprising a push handle assembly (50), said push handle assembly (50) being hinged to said rear frame (30), said push handle assembly further comprising a push handle support upper region (57) and a push handle support lower region (58) hinged to each other, said push handle support upper region (57) being hinged to a push handle extension (51) of said push handle assembly (50), said push handle support lower region (58) being hinged to the rear frame (30).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710242420.4A CN108725527B (en) | 2017-04-13 | 2017-04-13 | Folding vehicle |
| US15/822,434 US10272937B2 (en) | 2017-04-13 | 2017-11-27 | Expanding wheel frame wagon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710242420.4A CN108725527B (en) | 2017-04-13 | 2017-04-13 | Folding vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108725527A CN108725527A (en) | 2018-11-02 |
| CN108725527B true CN108725527B (en) | 2023-08-15 |
Family
ID=63791932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710242420.4A Active CN108725527B (en) | 2017-04-13 | 2017-04-13 | Folding vehicle |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US10272937B2 (en) |
| CN (1) | CN108725527B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| US10272937B2 (en) | 2019-04-30 |
| CN108725527A (en) | 2018-11-02 |
| US20180297622A1 (en) | 2018-10-18 |
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